Our cryopreservation bag is a unique bag film container that remains flexible at ultra-low temperatures (-196°C). Corning cryogenic containers are designed for storage, preservation and transfer of CD34+ hematopoietic progenitor cells (HPCs). The recommended fill volume ranges from 20 mL to 190 mL in four standard sizes. The freeze volume recommendation is based on horizontal freezing in a protective cassette with an internal thickness of approximately 0.313 inches. Corning offers this single-use cell culture bag in 50mL-750mL configurations. A special blend of polyolefin film and proprietary EVA was selected for its low temperature properties and its ability to maintain flexibility and clarity when filled with liquid. Proprietary membrane port design offers thinner walls for increased flexibility and attached cap minimizes membrane exposure during freezing. The industry standard label pocket design offers ease of use and traceability in labeling. -Port 1 features thin walled membrane ports, two PVC leads, female luers, male luer caps, and small slide clamps. This single-use cell cryopreservation bag is ideal for basic research biopharmaceutical applications. - Complete Certificate of Compliance is available for each production lot.